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        import {area,circumference} from './circle.js';

        console.log('圆面积：'+area(4));
        console.log('圆周长：'+circumference(14));

        import*as circle from './circle.js';

        console.log('圆面积：'+circle.area(4));
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    <script>
        import * as rectplus from './rectPlus.js'
        console.log(rectplus.area(3,5));
        console.log(rectplus.pi);

        import perim from './rectPlus.js';
        console.log(perim(4,6));
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